Swapped the LA for a magnum setup

Discussion in 'Magnum Engine Swaps' started by o1heavy, Apr 23, 2018.

  1. o1heavy

    o1heavy 1974 dart sport

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    did a magnum swap in my sons race car
    Hurt the LA engine and used what we had hopefully it will be faster here’s the details of both
    LA 360
    340 x heads with port work
    Kb 191 piston roughly 10.5 compression
    Purple shaft 292/509. 1.6 rockers Ha ha
    Rpm airgap 750 Holley
    Best et was 6.97 wanna say at 95-97 mph
    Magnum set
    Eq 2.02 heads little port work
    Right at 11to 1 compression
    Comp cam 245 duration 5.85 lift on a 108
    Lsa hyd roller
    With the same airgap and carb
    Side note
    The magnum engine sounds nasty if that means anything
    Got a few minor issues then we will test and tune
     
    Last edited: Apr 23, 2018
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    • gtsdude

      gtsdude Well-Known Member

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      Will be interesting to see how it runs, I was thinking of putting together something similar while I freshen up the 340 in my car.
       
    • Jadaharabi

      Jadaharabi FABO Gold Member FABO Gold Member

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      What effect did 1.6 rocker have on the motor with the 509 cam?
       
    • mgoblue9798

      mgoblue9798 Member

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      Keep us posted. Would like to know how much difference there is between the two.
       
    • o1heavy

      o1heavy 1974 dart sport

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      Wish I could load a video
      The little magnum engine sounds angry
       
    • Abodybomber

      Abodybomber Breaking street machines , since 1983.....:)

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      That's a bad thing ?
      Let's post respect, and response on this one.
      Just different and possibly good.
       
    • o1heavy

      o1heavy 1974 dart sport

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      Magnum engine went 6.97 @98mph which was the best the LA 360 ever did in Great conditions
      Off the trailer with a terrible 60 foot
      Only got one pass in
      But I’m thinking the magnum make a touch more power
       
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      • gtsdude

        gtsdude Well-Known Member

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        That is a good run for 1st time out. Whats the motor in?
         
      • o1heavy

        o1heavy 1974 dart sport

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        2800lbs chevette I know
        not the car we want but it’s what we had
        My son’s 7.0 index car

        36242E01-AD04-43C7-8B36-B59C16B5FB08.jpeg

        520BEBAE-A226-42A0-9D36-2ED11F2D46B7.jpeg
         
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        • gtsdude

          gtsdude Well-Known Member

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          Nothing wrong with that! Getting the younger guys out there is what its all about.
           
        • Jadaharabi

          Jadaharabi FABO Gold Member FABO Gold Member

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          I'll bet that freaks some Chevy lovers out when they pops the hood.
           
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          • o1heavy

            o1heavy 1974 dart sport

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            It gets no respect
            But the kid has put some badass race cars on the trailer with it
             
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            • MOPEkidD-3

              MOPEkidD-3 Torsional Member

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              Whatever works, and IMO far less "offensive" than the other way around (Chevy in a Mopar). I think it's awesome you guys are keeping a Mopar engine on a budget and saving money on the car instead, actually pretty brilliant when you think about it... at the end of the day it doesn't really matter what a race car looks like, it's all about what's underneath.
               
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              • Abodybomber

                Abodybomber Breaking street machines , since 1983.....:)

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                Agreement ,Khalid ... The engineering has been done , why not take advantage of such?.
                 
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                • Abodybomber

                  Abodybomber Breaking street machines , since 1983.....:)

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                  Such ,is Truth ... As long as you make it fit correctly, and makd it honestly kick ass.. No problem, in my books....